Band-saw sharpener and setting machine



May zo 1924.

l ,494,995 H. cRADDocK BAND SAW SHARPENER AND SETTING M-ACHINE Filed Oct. 28, 1922 2 Sheets-Shee t l /l TTURNEYS May 20 1924.

' H. CRADDOCK BAND sAw SHARPENER AND SETTING MACHINE Filed Oct, 28, 1922 2 Sheets-Sheet. 2

Patented May 20, 19?..4.V

UNITI-:4Dl STATES HENRY RADDOCK, OF RENSSELAER, NEW YORK.

BAND-SAW' SHARPENER AND SETTING MACHINE.V

Application led October 28, 1922. Serial No. 597,679.

To all whom 'it may concern f' Be it known that l, HENRY CRADDooK, a citizen of the United States, and a resident of Rensselaer, in the county of Rensselaer, State of New York, have invented a new and Improved Band-Saw Sharpener and Setting Machine, of which the following is a full, clear, and exact description.

This invention relates to improvements in band saw sharpeners and setting machines, and more particularly to a motor or belt driven vertical band saw Sharpener and setting machine, an object of the invention being to provide a. machine of the character stated, which can be placed inoperative position with relation to the saw without the necessity of removing the saw from its frame, and which saves valuable room and equipment for holding the saws while being sharpened and set.

A'further object is to provide a machine of the character stated, which will be relatively small in size, which can be easily positioned for use, which can be manufactured and sold at a reasonably low price, which will be automatic in its operation, and which willmost efliciently perform the functions for which it is intended- 'With these and other objects in view, the invention consists in certain novelfeatures Vof construction and combinations, andarrangement of parts, as will be more fully hereinafter described and pointed .out-in the claims. l

In the accompanying drawings- Figure 1 is a view in side elevation partly in section illustrating my improved machine in operative position. l

Figure 2 is a View in elevation at right angles to Figure 1.

'f Figure 3 is a top plan view.

Figure 4 is a view in transverse section on the staggered line 4 4, of Figure 1.

Figure 5 is a view in transverse section on the line 5-5, of Figure 1.

Figure 6 is a fragmentary .view in side elevationillustrating a mounting for one of the saw set punches.

1 represents a band saw table `and 2 a vertically positioned band saw.

3 represents the base of my improved machine which may be positioned on the table 1 and is provided with a recess 4 in one edge for the accommodation ofthe saw 2.

'Al standard 5 is fixed to the base 3, and is provided at its upper end with a horizontal arm 6 parallel with base 3. The arm 6 1s made with a bearing 7 fora vertical shaft 8, the latter'having a thrust bearing 9 on base 3.

The standard 5 is provided with a bearing 10 in which a drive shaft 11 is mounted,

and this shaft 11 may bev driven in any dej.

sired manner to operate the machine as will be hereinafter described.

A pair of miter gears 12 and 13 connect the shafts 11 and 8 andI an anti-friction bearlng 14 is provided around the shaft 8 above the arm 6to receive the thrust of a keyed bushing 15, ythe latter having a pin .16 which projects upwardly into a notch 17 1n a rotary file 18. Thisfile 18 is beveled or shaped to correspond with the shape of the teeth of the saw and is clamped on the bushlng by meansV of anut 19 screwed onto the upper end of shaft 8 and having a washer 20 interposed between the nut and the bushing, so that the files can be changed to suit the teeth of the saw or for renewal when worn.

The bracket arm 21 is adjustably secured to one side of the arm 6 by means of a wing nut 22.V This wing nut being screwed to the end of a stud 23 fixed to thearm 6 and projecting through a slot 24 in the arm 21.

A vertically grooved saw guide 25 is fixed to the free end of arm: 21 and by reason of the vadjustment of said arm this guide kcan by the :rotary file 18. j

A. turn table 26 is liked to'tlieshaft 8 and provided with a cam 2T which functions to intermittently move apivoted lever 28.v This lever 28 ispivotally connected to a bifurcat- -ed bracket 29 on standard 5 by means of a pivot pin 30, and is formed at its pivoted end with a fork 31 straddling a stop pin 32.v

This stop pin 32 is positioned through the .be positioned as desired so that it will prop- 7erly. hold the saw in `position for engagement standard 5 and through a lug 33on bearing 100 10 and is formed wit-ha head 34 at its inner andfprovides pivotal the jaws toward each other.

' in regular succession to the operationv of the' step, step movements for "tion 'as'may be desired.

being clamped in the socket at the properV :longitudinal adjustment by means of a wing `screw '42. The plunger 41 is beveled at its outer'end to correspond with the bevel of the saw teeth, and has a central recess 43 in "its end to receive the point of the teeth and prevent the pin fromengaging the point as `it lmight injure the Y n latter. The file 18 is made with a recess 44 to accommodate the saw 2fand permit of its vertical 'step by step Jmovement, and Ywhile I have shown the part-s so arranged as to permit of a step movement at each complete 'revolution ofthe file, it is obvious that the parts 'mayjbeso' arranged to give as many a singleV revolu- 1 Afverticallpost 45 is provided on the base mounting forga pair ojfja'vvsv 46, the latter at theii` inner ends connectedby Ycoil springs 47 tending to separate Hthe outer endsof the jaws,

' and a cam 48 is fixed to theshaft 8 and engages rollers 49 on the jaws 46 andforces the outer ends of ,Blocks 50 'are supported on the jaws 46 and Vhavedovetailed connection as shown at L51 with vertical members 52 on the jaws, and saidbloclrs'arei'vertically adjustable in said members 52 to properly position saw set punches 53 carried thereby.

To permit of 'this adjustment,`the mem- ,bers 52 'are made with vertically positioned slots 54-rece1v1ng wing screws 55 which are screwed into threaded sockets 56 in the blocks, and clamp the blocks atthe desired verticalV adjustment.

The saw set punches 53 have suitablebeveled operating ends, and have screw threaded engagement with the blocks 50 to permitV Va dj ustment as clearly of their longitudinal These punches 53 have lshown in Figure.

heads v56 at their rear ends, and are lockedv inset position by lock nuts 57 as shown.

The operation is as follows: Rotarymotion Vfrom `drive shaft 11 is transmitted to shaft 8 through the medium of gears 12 and 13 and file 18 and turn table 16V are continuously revolved.

The file 18 sharpens the teeth, and the turnY table 26 through the medium of its cam 27` causes the lever 28 to move the plunger pin 41 vertically a distance of one tooth ofthe I saw at eaclicomplete revolution of the shaft,

and hence the saw 2 willbeA moved verticalfile. During this sharpening of the teeth,

in the support, shaft adapted to sharpen the teeth of'a band` ably 4v"carried, by the teeth and move-"the 'tooth at each Voperationgof the cam.

4ing 'with'v the saw set operation of the le, and means for moving ly step by step to presentthe teeth of the saw Hence it will be noted that the operationv and setting is simultaneous of sharpening and it will be noted that the and automatic,

machine can be placed on the saw table and Y engage the saw without the necessity of disconnecting the saw from its frame.

Various'slight changes might be made Vin the general form and arrangement of parts described without departing from my invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly scope of the appended claims.

l claim:

1. A machine of the character stated,com 'prising a support,

a rotary file mounted on said saw7 said file having 'a peripheral recessvfto ermitpassage of the saw teeth, an ad ustsaid support laterallyof said peripherally fall within the spirit andV a vertical shaft mounted Y "able vertical yguide bracket ,projecting romY recessedvtile, said bracket adapted to receive and guide said band saw, a rotary cam, and

a member operated by the cam to Vmove said band saw through rthe peripheral recess `vertically a distance of one tooth at each revolution of the cam.-

V2.' Ak machine of the characterv stated-comprising a rotary file, a rotary cam,a pivoted lever moved by the cam, andplungerpivftally connectedto the lever, apinadjustplunger and engaging' the teeth'of the saw whereby the rotation of the cam causes an intermittent movement ofthe saw a distance of one tooth.` j

3. A machine of the character stated,com

prising a-rotary file tary cam turning withf the file, a pivotally mounted lever moved by the cam, means for limiting' themovement of the lever, an arm pivotally ger pin adjustablein the arm and having a. recessed end receiving the point of the saw tooth and having a beveled end corresponding tothe bevel of the teeth v'whereby the plunger functions to engage the base'of the saw a distance of one 4. A machine of the character stated, comprising a rotaryV file, a pair'ofpivoted and spring pressed jaws, saw setting devicesv adjustably mounted in thefjaws,"a cam turnthe Vfile 'and 'operating the jaws of devicesisimultaneously with the thelile'a distance of one tooth at a time. j Y #5. A machineof'the character stated, oomprising a support, a vertical shaft mounted Ahaving a recess therein' for the passage'of the `teeth of v,a saw, a ro` connected to the lever, and, a-,plunin the support, a. rotary file on the shaft adapted to sharpen the teeth of a saw, said file having a recess therein for the movement of the saw teeth therethrough, a pair 0f of pivoted jaws, a sprin for separating the jaws, a cam on the shaft or forcing the jaws toward each other, blocks adjustably mounted in the jaws, and saw set plungers adjustable in the blocks and adapted to engage the teeth of the saw. v

6. A machine of the character stated, comprising a support, a vertical shaft mounted in the support, a rotary file on the shaft adapted to sharpen the teeth 0f a saw, said l'ile having a recess therein for the movement of the saw teeth therethrough, a pair of pivoted jaws, a spring for separating the jaws, a cam on the shaft for forcing the jaws toward each other, blocks adjustably mounted in the jaws, saw set plungers 'adjustable in the blocks and adapted to enga e i tical shaft mounted in the standard and the x base, a horizontal shaft supporting the standard, gears connecting said shafts, a recessed rotary ile on the shaft, a bushing keyed to the shaft and receiving the file, a pin on the bushing positioned in a recess of the file, means for clamping the file on the bushing, saw set devices on the base, a cam on the shaft operating the saw set devices, a saw feeding device, and a cam on the vertical shaft operating the saw feeding device.

HENRY CRADDOCK. j 

